Rotary pump and the like



Aug. 10 1926. 1,595,093

C. D. HELM ROTARY PUMP AND THE LIKE File-L1 Feb. 5. 1924 4 Shee'ts Sheet 1' GLYDEDITELTT Aug. 10 1926.

c. o. HELM ROTARY PUMP AND THE LIKE Filed Feb. 5, 1924 4 Sheets-Sheet 2 v vpbaflom i OLYDEDHELT'I I C. D. HELM ROTARY PUMP AND THE LIKE Aug. 10 1926.

Filed Feb. 5. 1924 4 Sheets-Sheet 3 Aug. 10 1926.

C. D. HELM ROTARY PUMP AND THE LIKE Filed Feb. 5. 1924 4 Sheets-Sheet 4 I awuwwtoz OLYDEDITELM a, a; m

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Patented Aug. 10, 1926.

urrr o STATES CLYDE D. I-IELM, OF FORT WORTH, TEXAS.

ROTARY PUMP AND THE LIKE.

Application filed February My invention relates to rotary pumps and motors; and the object is to provide a rotary pump or motor of high efiiciency and in which the driving elements operate with the least possible friction and in which positive control is provided for making the outer edges of the propellers run in a true circle so that friction against the interior of the surrounding wall is prevented and to pro vide sealing meansfor the propellers to prevent leakage between the propellers and the surrounding wall. -.Another object is to provide a pump or motor in which the power elements run in a true circle and to provide ofi-set bearings and controlling elements operating from said hearings to control the motion of the propellers. The object is to provide water and steam motors pumps for air, gasesg ammonia, and other liquids. Other objects and advantages will be fully ex:- plained in the following description and the invention will be more particularly pointed out in the claims.

Reference is had to the accompanying drawings which form a part of this. application. I

Fig; 1' is a longitudinal section ofthe rotor and a part of the casing shown in: section and apart shown in side elevation.

Fig. 2 is a cross s ction of the casing.

Fig. 3 is an interior elevation of one of the-rotor heads.

Fig. 4 is an elevation of the rotor,v showing, in dotted outline, the position of the blades or propellers.

Fig. 5 is a' perspective view of the rotor and the shaft.

Fig. 6 is a perspective view of the cylindrical part of the casing. t

Fig. 7 isan interior elevation of one of the casing heads.

8 is an elevation of the control yolres and a sectionv of one casing head.

Fig. 9 is an elevation of the pump. with one head of the casing removed. I

Fig. 10 is an end view of the rotor without the heads, and. Fig. 1 1: is a view of one of the propellers.

Similar charactersor" referenceare used to indicate the same parts throughout the several views. 7 v V The pump is provided with a circular casing wall 1 and heads 2 and 3 bolted there to. A rotor 4 is mounted therein by means of a shaft 5. The shaft 5 is j ournaled in the heads 2 and 3 and roller bearings 6 are pro- 5, 1924:. Serial N0. 690,738.

vided for the shaft 5 in the heads 2 and 3. End thrust bearings 7 are provided for the heads 2 and 3. The bearings 7 are adjustable by means or a collar 8 and a collar 9. The collar 8 is screwed on a collar 9. The collar 9 is adjusted on the shaft 5 and made rigid therewith by bolts 10. The collar 8 may then be adjusted and fixed on the collar 9 by bolts 11. The collars 8 and 9 are protected by caps 12 which are bolted to flanges 13 on the heads 2 and 3. Packing glands 14 for the pump are attached to the caps 12. The rotor 4 is made to move with the shaft 5 by means of the key 15;

The rotor 4 has heads 16 and the cylinder 1 has interior annular grooves 17 in which the heads 16 project. The outer peripheries of the heads 16 have annular grooves therein and packing or sealing rings 18 are mounted in these grooves for sealing purposes. The heads 16 have inwardly projecting hubs 19Yand cut-outs are made in the heads 16 and in the rotor 4 to receive propellers. The rotor 4 has four radially disposed slots 20 to receive the propellers. The heads 16 are positioned on the rotor 4 by dowel pins 21 and the heads 1-6 are attached to the rotor 4 by bolts 22.

Thepropellers 23ers mounted in the slots 20 in the rotor 4 and are movable radi'a ll in these slots. The'propellers are driven by the rotor and means are provided for controllingthe movement. of the propellers. The rotor 4 revolves with the shaft 5 as the center. But the heads 2 and'3 have circle bearings 24 which are offset relative to the center of the shaft 5. A cavity 25 concen tric relative to bearing 24 is formed in the casing but eccentric. relative'to the shaft 5 and the periphery 01" the rotor will follow the circle 26,.sl1own in Fig. 9, but the outer edges of the propellers 23 will follow the circle 27 and thus compel the fluid which is being pumped to pass through the lower part of the space 25. The fluid'will be received through the intake 28 and discharged through the outlet 29. The outer edges of the propellers 23 are provided With slots therein for sealing bars 30 which are loosely mounted in the slots. The outer edges of the propellers are made to follow the circle line 27 by means of the control yokes 31, 32, 33, and 34 which are mounted on the bearing 24 of the casing. It will be understoodithat the heads 2 and 3 are both provided'with bearings 24 and that the yokes 31, 32, 33, and 3d are provided on both heads. The yoke 31 has a sleeve 35 on which ring yokes 32, 33, and 3d are loosely mounted. T he sleeve 35 runs on ball bearings which engage the bearing Each blade 23 has lugs or trunnions 3'? which project through slots 38 in heads 16 and the ends of the propellers 23 run in grooves 39 in the inside of heads 16 and these grooves 39 are in align m-ent with slots 26 in the rotor l. Each ring 31, 32, 33, and 34-, has a bearing 40 to receive a trunnion lhe slots 38 are radially dispoeed to guide the movement of the propellers 23. Thus positive drive of the propellers radiallyis afforded by the bearing cams 2st and the control rings 81, 32, 38, and 3% and the revolving drive is ati'orded by the shaft 5. The rings 31, 32, 33, and 3d prevent friction of the propellers against the inner periphery of the casing 1 and the loosely mounted sealing bars 30 c-o-operate with the propellers. A positive cut-olf or division 41 is provided to form a seal for the rotor. Fluid is taken in through intake 28 and the fluid passes through the slots 42 which extend to the seal 41. The outlet 29 has the same openings or grooves 42. The object is to prevent the trapping of the water or other fluid, in case of heavy pressure. Cavities 43 are. made in the casing heads 2 and 3 for the propeller control rings 31-55%. The motor has rotor driven with main shaft 5 as the center of the drive and has an oilset propeller control anda'load is taken on gradually and discharged gradually. The propeller control rings 31 movement relative to each other to compen sate for oif-center positions and to prevent binding. In operation, two diagonally opposite bearings 40 do not always remain diagonally opposite.

One of the distinguishing features of this invention is that the rotor runs in a true circle which is concentric with the main shaft and the propeller control rings are true circles and the bearings 2d are true circles. It is apparent that the rotor may be changed in construction and various changes in the construction, sizes, proportions, and arrangement of the several parts may be made without departing from my invention.

lVhatI claim, is, V

1. A rotary pump comprising a casing composed of a cylindrical member provided with a circular cavity therein and heads for said cylindrical member provided with curved cavities in their inner faces, a drive shaft and a rotor mounted thereon within said casing and provided with radial grooves therein, off-set circle bearings on the inner faces of said heads, propellers loosely mounted in said grooves and driven by said rotor, and propeller controlling rings nested together .and mounted and revoluble on said bearings and operatively connected to said 34 have slight propellers,.a pair of rings being used for each propeller.

2. A rotary pump comprising a casing composed of a cylindrical member provided with a circular cavity the em and heads for said cylindrical member provided with curved cavities in their inner faces, a drive shaft journaled in said casing and a rotor mounted on said shaft and driven thereby within casing and provided with radial grooves therein, propellers mounted loosely in said grooves and driven by rotor, cits t bearing members formed on the inner es of said heads, and propeller controlnien'ibers nested together and surroundin and revoluble on said bearings and operatively connected to said propellers.

3. A rotary pump comprising a casing composed of a cylindrical member provided. with a circular cavity therein and heads for said cylindrical member provided with curved cavities in their inner faces, a drive shaft journaled in said casing and a rotor mounted on said shaft and driven thereby within said casing and provided with radial grooves therein, propellers mounted loosely in said grooves and driven by said rotor,

off-set bearing members formed on the inner faces of said heads, and propeller con trolling members nested together and mounted in said off-set curved cavities and surrounding said bearings and operatively connected to said propellers and serving to hold said propellers out of contact with the inner periphery of said cylinder.

i. A rotary pump comprising a casing composed of surrounding circular member and heads attached thereto and, provided with curved cavities in their inner faces, a drive shaft journaled in said casing and a rotor mounted thereon and driven thereby within said casing and concentric with said casing and provided with radial grooves therein, propellers mounted loosely in said grooves and movable radially therein and driven by said rotor, oft-set bearing memers formed on the inner faces of said reads, and propeller controlling rings mounted in said curved cavities, one ring having a sleeve surrounding said bearings and the other ring running on said sleeve and all rings operatively connected to said propellers. V

5. A rotary pump comprising a casing composed of a surrounding circular member and heads attached thereto and provided with curved cavities in their inner faces, a drive shaft journaled in said casing and a rotor mounted thereon and provided with radial grooves, propellers mounted loosely in said grooves and movable radially therein and driven by said rotor, off-set circle bearing members formed onthe inner faces of said heads, a pair of propeller controlling members having sleeve hubsmounted llll) and revoluble on said bearing members and three pairs of propeller controlling .members mounted on said sleeve hubs and all of said propeller controlling members being operatively connected to said propellers.

6. A rotary pump comprising a casing composed of a surrounding circular member and heads attached thereto and provided with curved cavities in their inner faces, a drive shaft journaled in said casing and a rotor mounted thereon and provided With radial grooves and slots, propellers mounted loosely in said grooves and movable radially therein driven by said rotor provided with lugs operating through said slots, oflf-set circle bearings formed on the inner faces of said heads, and propeller controlling rings nested together and mounted on said bearings and controlling the radial movementof said propellers, said rings having movement relative to' each other to compensate for off-center positions and to prevent bindlng.

7. A rotary pump comprising a casing composed of a cylindrical member provided with a circular cavity therein and inletvand discharge ports and heads for said cylindrical member, a drive shaft, and a rotor mounted thereon Within said casing and provided With heads having radial grooves and slots therein, oft-set circular bearings rigid with said heads, a plurality of propellers mounted loosely in said grooves and driven by said rotor and provided With sealing ele ments in their outer edges, and propellercontrolling members nested together on said bearings and operatively connected to said propellers through said slots.

In testimony whereof, I set my hand, this 12th day of January, 1924.

CLYDE D. HELM. 

